"Unfortunately there's no secret. I work out and eat right. I wish I could tell you something else. A lot of people think I've had stomach surgery - I haven't. It's taken me three years."

Asked whether she ever lost her willpower and binged, she admitted: "Hell, yeah! I had a photoshoot in a bikini a while ago and I didn't want to do it, but I was really healthy and doing my yoga before it.

"As soon as it was over, I was eating everything I could get my hands on - pizza, anything...